Camera optical lens

A camera optical lens, comprising six lenses in total, the six lenses are, from an object side to an image side in sequence:

• a first lens having a positive refractive power;
• a second lens having a negative refractive power;
• a third lens having a negative refractive power;
• a fourth lens having a negative refractive power;
• a fifth lens having a positive refractive power;
• and
• a sixth lens having a negative refractive power;
• wherein, the camera optical lens satisfies the following conditions:
• −2.50≤f2/f≤−1.20;
• 3.50≤(R5+R6)/(R5−R6)≤12.00;
• 4.00≤R10/R9;
• and
• 0.50≤d5/d6≤1.20;
• where,
• f denotes a focus length of the camera optical lens;
• f2 denotes a focus length of the second lens;
• R5 denotes a central curvature radius of an object side surface of the third lens;
• R6 denotes a central curvature radius of an image side surface of the third lens;
• R9 denotes a central curvature radius of an object side surface of the fifth lens;
• R10 denotes a central curvature radius of an image side surface of the fifth lens;
• d5 denotes an on-axis thickness of the third lens;
• and
• d6 denotes an on-axis distance from the image side surface of the third lens to an object side surface of the fourth lens.